KH63G Study On Improving The Machining Accuracy Of Spindle Box Of The Main Aperture

CNC machining centers and CNC machinery and equipment by the system consist of automated machine tools with high efficiency machining of complex parts. Case is a basic part of mechanical parts. It relates parts assembly shaft, sleeve, gear and other components as a whole to maintain accurate positional relationship. The structure of complex shape, uneven wall thickness, hole machining require more and more difficult. Precision flat face of the housing system directly affects the accuracy of the assembly later.In CA6140 the spindle CNC machining and CNC programming technology research regarding CA6140 The spindle as the main object, according to the general contents of CNC machining process, design CA6140 headstock and its flat faces make process analysis system. CA6140 headstock design process route, step and step, combined with the actual CNC machining experience to choose the right tools and fixtures.Paper describes the main processes CA6140 spindle box, allowance, cutting the amount of other parameters, and produced a corresponding process card. CA6140 spindle for machining holes cabinet, not only for the hole itself requires high precision, and accuracy of the mutual position between the holes also have very strict standards. Therefore, based on the characteristics of the housing holes through drilling, expanding, reaming and hole milling two different processing methods, compare analysis of the two which can effectively improve the CA6140 main aperture size accuracy. At the same time, using different positioning reference also has a direct effect on the positional accuracy between the hole and hole. After choose from three different positioning methods to compare that a larger hole positioning reference, with a smaller hole and hole positioning reference between each other benchmarks, which select the best way to improve positioning between holes positional accuracy, provide a reference for the actual processing.After using CAM software, create the spindle housing CA6140 three-dimensional modeling and in its processing environment, make its NC programming. According to the characteristics of CA6140 the spindle machining processes. By specifying processing coordinate system MCS and WCS, design and processing parameters, edit tracks, designed NC program, finally got the box of processing 3D toolpaths and simulation process. Then enter the subsequent processor generates a G code. After completion of the cabinet NC programming, using VERICUT machining simulation software, according to documents obtained by post-processing, simulate actual machining process. Choose the best processing methods and improve the positioning reference CA6140 main spindle housing aperture precision.